I'm here to praise Rubio, not to bury him. But he's not seeking the Presidency, and won't this time. On the other hand, I predict Rubio will be the Republican VP candidate no matter who's at the top of the ticket. Think about it:

I want the best possible Rubio if and when he does become president someday down the line. And, for that, I think a few more years won’t hurt. . . [L]et’s not encourage Rubio to waste his talents on a throwaway election (or in a throwaway position like the vice presidency). Let’s wait for him to run when he’s ready.